Hallo Peter,
> It turns out that your v8 patch still has the issue complained about in [0].
> The issue is that after COMMIT AND CHAIN, the internal savepoint is gone, but
> the patched psql still thinks it should be there and tries to release it,
> which leads to errors.
Indeed. Thanks for the catch.
Attached v9 integrates your tests and makes them work.
--
Fabien.